electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. The current density vector is...
23 KB (2,812 words) - 02:59, 27 May 2024
In electrochemistry, exchange current density is a parameter used in the Tafel equation, Butler–Volmer equation and other electrochemical kinetics expressions...
4 KB (470 words) - 17:53, 30 June 2024
Wiktionary, the free dictionary. Current density Displacement current (electric) and Magnetic current § Magnetic displacement current Electric shock Electrical...
53 KB (6,345 words) - 12:14, 5 August 2024
hydrodynamics and electric currents in electromagnetism. As in those fields, the probability current (i.e. the probability current density) is related to the...
18 KB (3,021 words) - 17:30, 18 June 2024
general relativity, the four-current (technically the four-current density) is the four-dimensional analogue of the current density, with units of charge per...
6 KB (807 words) - 16:44, 2 December 2023
Displacement current density has the same units as electric current density, and it is a source of the magnetic field just as actual current is. However...
29 KB (3,850 words) - 17:23, 17 April 2024
electromagnetism, polarization density (or electric polarization, or simply polarization) is the vector field that expresses the volumetric density of permanent or induced...
24 KB (3,373 words) - 10:30, 6 March 2024
Electrical resistivity and conductivity (section Relation between current density and electric current velocity)
x} , J ( x ) {\displaystyle J(x)} is the current density at the point x {\displaystyle x} . The current density is parallel to the electric field by necessity...
75 KB (7,945 words) - 18:24, 8 August 2024
electromagnetism, charge density is the amount of electric charge per unit length, surface area, or volume. Volume charge density (symbolized by the Greek...
25 KB (3,738 words) - 01:46, 24 April 2024
In electromagnetism, an eddy current (also called Foucault's current) is a loop of electric current induced within conductors by a changing magnetic field...
31 KB (3,534 words) - 13:20, 18 August 2024
Current density imaging (CDI) is an extension of magnetic resonance imaging (MRI), developed at the University of Toronto. It employs two techniques for...
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the cathodic partial current density ic (positive) and the anodic partial current density ia (negative) gives the net current density i: i = ic + ia In the...
3 KB (309 words) - 23:01, 18 July 2022
of a few skin depths. The skin depth is the thickness at which the current density is reduced by 63%. Even at relatively low frequencies used for power...
48 KB (5,948 words) - 15:30, 25 July 2024
Magnetization (redirect from Magnetization current)
of magnetic fields (B, H), electric fields (E, D), charge density (ρ), and current density (J) is described by Maxwell's equations. The role of the magnetization...
13 KB (1,503 words) - 14:01, 5 August 2024
Particle density (particle count), number of particles per unit volume Area-specific quantity, the quotient of a physical quantity and area Current density, the...
4 KB (495 words) - 02:52, 16 October 2023
cross-sectional area of the disc and the current density. The equation for the on-axis magnetic flux density of a Bitter disc becomes much more complex...
11 KB (1,261 words) - 04:08, 14 August 2024
{\displaystyle \mathbf {J} =\sigma \mathbf {E} ,} where J is the current density at a given location in a resistive material, E is the electric field...
47 KB (6,032 words) - 23:03, 6 August 2024
tendency of an alternating electric current (AC) to become distributed within a conductor such that the current density is largest near the surface of the...
44 KB (5,702 words) - 03:06, 6 August 2024
Magnetic field (redirect from Magnetic flux density)
_{\mathrm {f} }\times {\hat {\mathbf {n} }},} where Kf is the surface free current density and the unit normal n ^ {\displaystyle {\hat {\mathbf {n} }}} points...
104 KB (12,959 words) - 07:52, 9 August 2024
Maxwell's equations (redirect from Bound current)
ρ {\displaystyle \rho } the electric charge density and J {\displaystyle \mathbf {J} } the current density. ε 0 {\displaystyle \varepsilon _{0}} is the...
76 KB (7,887 words) - 00:18, 17 August 2024
Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through...
17 KB (1,946 words) - 05:17, 25 June 2024
streams Convection current, flow caused by unstable density variation due to temperature differences Current (mathematics), geometrical current in differential...
4 KB (504 words) - 03:27, 2 May 2024
Ampère's circuital law (redirect from Ampere's Current Law)
B or H magnetic fields. These two forms use the total current density and free current density, respectively. The B and H fields are related by the constitutive...
31 KB (3,817 words) - 19:22, 2 June 2024
current. Magnetic currents produce an electric field analogously to the production of a magnetic field by electric currents. Magnetic current density...
9 KB (1,085 words) - 00:11, 5 March 2024
Population density (in agriculture: standing stock or plant density) is a measurement of population per unit land area. It is mostly applied to humans...
15 KB (1,066 words) - 08:32, 17 June 2024
Flux (redirect from Flux density)
corresponding flux density is a flux according to the transport definition. Given a current such as electric current—charge per time, current density would also...
28 KB (3,845 words) - 15:56, 27 April 2024
magnetic flux density B at position r in 3D-space generated by a filamentary current I (for example due to a wire). A steady (or stationary) current is a continual...
21 KB (3,015 words) - 19:35, 6 August 2024
A current filament is an inhomogeneity in the current density distribution lateral to the direction of the current flow (that is, orthogonal to the current...
846 bytes (88 words) - 11:42, 8 March 2024
This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes...
55 KB (1,652 words) - 02:53, 16 August 2024
functional or by the inclusion of additive terms, is a current research topic. Classical density functional theory uses a similar formalism to calculate...
79 KB (10,545 words) - 03:52, 13 August 2024